CRCHI Hard Rock TBM Exceeds 1000 meters per month in Peru

On December 6, the first hard rock TBM exported to South America by CRCHI created a advance rate record of more than 1000 meters per month in the construction of San Gawang Hydropower Project in Peru.

The San Gawang Hydropower Station in Peru is a representative project of the Belt and Road Initiative in South America and the first power project invested by Chinese enterprises in Peru. The total installed capacity of the San Gawang Hydropower Station is 209.3 MW, and the designed annual power generation is 1.25 billion kWh. After the completion and operation, it will greatly promote the optimal allocation of regional water resources and sustainable economic and social development in South America.

The TBM is about 245m long and the cutterhead diameter is 5.83m. It is particularly suitable for tunneling in the geological conditions of San Gawang Hydropower Station. The surrounding rock of the tunnel has good stability and the strength of the rock stratum is medium-high.

During the TBM assembly and commissioning, the on-site service team of CRCHI closely cooperated with the owner and the constructor. In less than 40 days, the TBM main body assembly and pushing horizontally into the tunnel work were completed, and the split launching was realized. After the TBM was powered on, it took only two weeks to complete the single machine commissioning, joint commissioning and etc., realizing the formal launching.

Since November this year, the single shift advance rate of TBM has kept breaking new records: from 10m per shift to 16m and 20m per shift. The maximum single shift advance rate exceeded 26m and the maximum daily advance rate reached 46 m. The cumulative advance rate in November has reached 1007.9 meters, which has greatly shortened the construction period.